According to cell theory, all cells carry out the function needed to sustain life.It means all cells must contain DNA as it is a molecule that holds biological instructions to develop, survive, and reproduce.
Thus, option A is correct.
DNA is deoxyribonucleic acid made up of two polynucleotide chains that arranged in a double helical structure.
The main functions of DNA are replication, uncoding information,recombination and gene expression.
DNA plays a vital role and it is considered as primary unit of heredity in all types of organisms.
Therefore,According to cell theory, all cells carry out the function needed to sustain life.It means all cells must contain DNA as it is a molecule that holds biological instructions to develop, survive, and reproduce.
Thus, option A is correct.
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